I wonder what percent of total energy use of viewing the page around the world is from the web server and what from the routers and network infrastructure and r

I wonder what percent of total energy use of viewing the page around the world is from the web server and what from the routers and network infrastructure and rendering on the browser? This is an interesting experiment, but I struggle to see how a 'low-tech' under utilised website would consume less energy in its lifetime (including manufacture, delivery etc) per page view than a high performance, globally cached (CloudFront/Flare etc), highly utilised shared web service in a data centre.